Building material and process of making same.



COATING UR PLASIIU I UNITED STATES PATENT OFFICE.

ARTHUR WINDING AND FREDERICK W. GEZELSCHAP, F MILWAUKEE, WISCONSIN.

BUILDING MATERIAL AND PROCESS OF MAKING SAME.

No Drawing.

To all whom it may concern:

Be it known that we, Amnfm \VINDING and FREDERICK \V. GEzELsoHAP, citizens of the United States, residing at Milwaukee,

in the county of Milwaukee and State of \Visconsin, have invented certain new and useful Improvements in Building Material and Processes of Making the Same, of which the following is a specification.

This invention relates to an indurated non-metallic material, the foundation of which consists of a non-combustible substance such as asbestos, and to the process of making suchinaterial. Its object is to produce a comparatively light, inexpensive and durable material for covering buildings and similar purposes, which will be practically fire and weather proof and impervious to moisture and air.

It consists in the peculiarmethod or process of producing such material and in the product of such process as hereinafter particularly described and defined in the appended claims.

In the production of the above mentioned material by the above mentioned method or process, asbestos or some similar incombustible or su stantially incombust-ible substance, formed with a suitable binder, such as silicate of ma esia@silicate of soda into Boards or sEeets or other desired shapes, is saturated, incorporated or coated with a compound of carbon or a carbonaceous substance. This may be done y su ec mg e oards, sheets or other forms of asbestos or the like, to a bath or coating of coal tar or bituminous or mineral pitch heated -or thinned with coal oil or.

ot ier similar liquid, to make it suificlently,

fluid to penetrate the asbestos boards, sheets or the like, and to fill or enter the interstices therein. The material having been thus saturated or coated with coal tar or other carbonaceous compound or substance in a fluid form capable 1when heated of} depositing or forming ra itic or amor ous car on or carbon in a sufistantia y 1ncom usl e or refractory form, is subjected to fire or is heated to a suificlently high temperature and fdi' a sufficient time to eliminate the volatile or combustible constituents of the carbonaceous compound or substance, leaving the asbestos or other incombustible foundation substance impregnated with the refractory Specification of Letters Patent.

Patented Apr. 7, 1914.

Application filed March 28, f910. Serial No. 551,916. a )5 7 J or non-inflammable residue or constituents of the carbonaceous compound or substance.

By the foregoing treatment the asbestos board or the like is rendered dense, tough and durable, and is made, practically impervious to moisture and air. Material so produced being light, durable and practically fire, water and weather proof, has a metallic ring, and in the various forms in which it may be made, such as boards or sheets of the desired thickness and other dimensions, is admirably adapted for roofing and covering buildings and similar purposes.

As a concrete example, the process emfor roofing or covering buildings will be specifically described. 7 I

Boards or sheets of the desired size and thickness formed in the usual way of asbestos with a suitable binder as above stated, being in a loose or porous and absorbent condition, are dipped into a bath of ordinary coal tar heated or warmed, to render it sufliciently fiuid to readily and thoroughly penetrate and saturate them. They are then removed from the bath and after superfluous tar has been drained therefrom, they are right position, in a fire supplied with sufficient fuel to ignite the tar, which-is allowed to burn till all the inflammable or combustible constituents thereof are consumed or eliminated and the fire resulting therefrom dies out. The burning of the tar produces amorphous carbon, some of which adheres to vthe surfaces of the boards or sheets in the form of a crust or scale. Underneath this crust or scale, which serves to exclude air, graphitic carbon or carbon of crystalline structure and metallic luster intimately incorporated with the asbestos, is'formed by the high temperature resulting from the burning tar. The crust or scale being removed by jarring or scraping, leaves the boards or sheets with smooth, dense, hard and glossy surfaces. The tar in the interior of the boards or sheets where it 'is not exposed directly to the flame of the fire and combustion cannot take place on account of ployed in the production of boards or sheets placed, preferably edgewise orvin an up-' the" absence of air, is highly heated and boiled or driven out to the surfaces of the boards or sheets, where it is either consumed or converted into graphitic or amorphous carbon, leaving the interior of the boards or sheets tough,

- jecting the saturated body to fire to ignite and burn the tar until all the inflammable constituents of the hydrocarbon are eliminated and refractory carbon is formed and burned into and intimately incorporated with the asbestos.

2. An indurated, non-metallic and substantially fire, water and weather proof buildin material, consistin of a porous body 0 asbestos formed wit a binder into the desired shape, impregnated with noninflammable residue of a hydrocarbon and having a dense, hard and lustrous surface of refractory carbon burned into and intimately incorporated with the asbestos and possessing tough, non-friable, pliable and water-proof characteristics.

In witness whereof we hereto affix our signatures in presence of two witnesses.

ARTHUR WINDING. FREDERICK W. GEZELSCHAP.

Witnesses:

CHAS. L. Goss, ALICE E. Goss. 

